Rotary snap-switch.



No. 793,065. PATENTED JUNE 27, 1905. M. GUETT.

ROTARY SNAP SWITCH.

APPLIOATION FILED MAR.10, 1904,

cation.

UNITED STATES Patented June 27, 1905.

PATENT OFFICE.

MONROE GUETT, OF HARTFORD, CONNECTICUT, ASSIGNOR TO HART &

HEGEMAN MANUFACTURING COMPANY, OF HARTFORD, CONNECTI- CUT, A CORPORATION OF CONNEC"ICUT.

ROTARY SNAP-SWITCH.

SPECIFICATION forming part of Letters Patent No. 793,065, dated June 27, 1905.

Application filed March 10, 1904. Serial No. 197,404.

To (tZZ whom it may concern:

Be it known that I, MONROE Gun'r'r, a citizen of the United States of America, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Rotary Snap- Switches, of which the following is a specifi- The object of the invention is to improve the construction of switches of this kind, and more particularly to relieve the parts from shock when the contacts are moved.

The operation of the ordinary rotary snapswitch is well known. The pole-pieces are held against movement during the initial movement of the operating-handle, so that a spring may be wound up to throw the poles With a sharp and quick action when they are released in order to make and break contact quickly and surely and avoid injurious arcing. It is also understood that at the proper time a stop is moved into the path of movement of the rotary poles in order to position them properly at the end of each throw. The constant hammering of the rotary member on these stops wears the parts away and subjects the poles and their supporting parts to a continual shock, which in a comparatively short space of time disarranges the parts of the switch, so that it is nnserviceable.

The particular object of my invention is to eliminate to a considerable extent the shock on the switch parts by providingat some point a yielding buffer to receive the impact of the rotary poles.

Referring to the drawings, Figure 1 is a plan view of the base of a switch, the spindle carrying the rotary poles beingshown in section on the line 1 1 of Fig. 6. Fig. 2. is aside elevation of a switch, showing the base and the lower end of the spindle in section. Figs. 3, at, and 5 are detail views on lines 3 3, 4t 4, 5 5, respectively, of Fig. 6, showing the mechanism for operating the poles. Fig. 6 is a side elevation of the spindle and the parts carried thereby.

In the drawings, a is a base having the posts a carrying contacts a. In this base there is pivotally mounted the spindle 7), having the operating-handle I) at its end. This spindle carries the poles c, which are connected to the spindle by the spring (I. (Seen in Fig. 5.) Underneath the poles and secured thereto is the detent-plate (1, which engages one side of the stop f. This stop is mounted eccentrically on the spindle, as seen in Fig. 3, and is engaged on its other side by the shoulders g on the stop-plate which has a downwardlyprojecting central portion g, which is received in the hubm' of theplate m. A washer n overlies the lower endof the hub m and engages a groove in the end of the spindle I), thus uniting the parts. It will be seen that the diameter of the hub 11/ is smaller than the socket in the base in which the spring is coiled. This plate has a lug 1', which projects downwardly through a suitable slot in the plate m and lies against the end of a spring I, (seen in Figs. 1 and 2,) which is coiled in a socket in the base, its opposite end being held by a pin It will be seen that when the handle I) and the spindle are turned the contacts are held against movement because of the engagement of the detentplatee with one side of the stop f, which on its other side engages the stationary stop-plate By reference to Fig. 5 it will be seen that this movement of the spindle I), to which one end of the spring (Z is attached, causes the spring to be wound up on the spindle. By reference to Fig. 3 it will be seen that the rotation of the spindle I), through the eccentric, moves the stop f outwardly until it is free of the shoulder g on the plate g. At this time the spring (Z throws the poles, the stop being retracted by the eccentric, so that it engages the next shoulder-y on the plate (7, preventing further rotation of the poles.

The parts bring up against the shoulder g with considerable force, causing the plate 9 to rotate slightly against the buffer, which in this case is the spring 1, and relieving the parts from shock.

I do not wish to limitmyself to the particular embodiment of the invention shown and described herein, as it is evident that it may be necessary to alter the construction in order that it may be applied to different types of switches. It is clear also that this yielding abutment can be placed at different points in the train of connected operating elements.

I claim as my invention 1. In a rotary snap-switch, poles and an opcrating-handle connected therewith through a spring, means for positively locking said poles against movement during a predetermined movement of the operating handle, means for releasing the said poles, and a yielding buffer located back of said poles, substantially as described.

2. In a rotary snap-switch the combination with the poles and an operating-handle connected therewith through a spring, of stops adapted to positively lock said poles in their different positions during a predetermined movement of said operating-handle, means actuated by said operating-handle for disengaging said stops and said poles, and a yielding bufler located back of said poles, as and for the purposes specified.

3. In a rotary snap-switch in combination a rotary pole-carrying member, an operating handle connected therewith through a spring, a non-rotary member positively locked with said rotary pole-carrying member during a predetermined movement of the operatinghandle, means actuated by said operating-handle for disengaging said interlocking members, whereby said rotary pole-carrying member may be thrown under the influence of said spring to its next position which is determined by the positive interlocking of the rotary polecarrying member With the non-rotary member, and a yielding buffer located at a point in the train back of the rotary pole-carrying member, substantially as described and for the purposes set forth.

4:. In a rotary snap-switch the combination with the stationary and movable contacts, and an operating-handle for the latter connected therewith through a spring, a detent-plate connected with the movable contacts, a stopplate, and a radially-movable stop located between the detent and stop plates, and a bufler arranged back of said stopplate, substantially as described.

5. In a rotary snap-switch the combination with the stationary and movable contacts, and an operating-handle for the latter connected therewith through a spring, a detent-plate connected with the movable contacts, a stop-plate, and a radially-movable stop between the detent and stop plates, a projection on said stopplate, and a spring engaged by said projection, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

MONROE GUETT.

Witnesses:

FRANCIS H. PARKER, H. E. HART. 

